Fermi Level for Silicon

  • Thread starter tot
  • Start date
  • #1
tot
43
0
what I've been told there is two groups of energy levels called the valence and the conduction band.

what is the fermi level for silicon?
how wide is the band gap for silicon?
 
Last edited:

Answers and Replies

  • #2
31
1
Well, if we are talking about intrinsic silicon (undoped silicon) then the fermi energy is directly in the center of the band gap. This means that the concentration of holes and electrons is equal. Doping the silicon will move the fermi energy towards the valence band or the conduction band depending on the doping.

The band gap for silicon is 1.12eV

[tex]E_f - E_i = kT ln\frac{n}{n_i}[/tex]
 
  • #3
tot
43
0
is 1.12eV the width of the band gap or the fermi level?
what is the fermi level for undoped silicon?
 
Last edited:
  • #4
31
1
That is the width of the band gap as I stated in the last post. The fermi level for undoped silicon lies directly inbetween the conduction band and the valence band. I have also provided you with the equation that you need to find the fermi level.
 
  • #5
tot
43
0
i dont understand the equation. please explain how you find the fermi level
 

Related Threads on Fermi Level for Silicon

  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
6
Views
6K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
1K
Replies
21
Views
77K
Replies
17
Views
10K
Top